GAOTek Nitrogen Gas Detector

GAOTek nitrogen gas detector adopts a 2.31-inch high-definition color screen for real-time display and adopts gas sensors of well-known brands in the industry.

GAOTek -NDGD-109



GAOTek nitrogen gas detector adopts a 2.31-inch high-definition color screen for real-time display and adopts gas sensors of well-known brands in the industry. It is used to quickly detect the concentration of various gases and the measurement of ambient temperature and humidity, and alarm if the measurement exceeds the limit. It is suitable for detecting gas concentration in pipelines or confined spaces and atmospheric environments; gas leakage or high concentration single gas purity where various background gases are nitrogen or oxygen. There are more than 500 kinds of detected gases.



  • It can detect 1 to 4 kinds of gases at the same time, and the unit can be switched: Optional units: PPM, mg/m3, VOL %, LEL %, PPHM, ppb, mg/L
  • Built-in pumping measurement, integrated water vapor and dust filter, quick response and support long-distance sampling
  • Rich man-machine interface. The 2.31 inch high-definition color screen displays real-time concentration, alarm, time, temperature, humidity and storage, communication
  • Large-capacity data storage function, support multiple storage methods
  • High temperature gas detection (optional)
  • Three display modes can be switched
  • Graphic display. Reflect the trend of gas concentration changes over a period of time in the form of a curve


Technical Specifications

Detection gas carbon dioxide CO2 Nitrogen N2 Oxygen O2 Optional: can detect 4 kinds of gas concentration and temperature and humidity
Scope of detection CO2: 0 to 100 % VOL, N2: 0 to 100 % VOL, O2: 0 to 30 % VOL CO2: 0 to 100 % VOL, N2: 0 to 100 % VOL, O2: 0 to 100 % VOL
Resolution 0.01 % vol
Detection principle CO2: Infrared principles NDIR N2 NO2: Electrochemical principles
Sensor life 5 to 6 years
Detection method Built-in pump suction, flow rate 500 ml/min
Display method 320 x 240 high-definition color screen display, 5 buttons operation
Detection accuracy ≤ ± 1 % F.S
Linearity ≤ ± 2 %
Alarm method Sound and light alarm, vibration alarm, visual alarm, sound and light + vibration + visual alarm, shut off the alarm
Recovery Time ≤ 30 s
Response time ≤ 20 s
Power supply DC3.6 V
Battery capacity 3.6 VDC, 4500 mA large-capacity rechargeable polymer battery, with overcharge, over-discharge, overvoltage, overheating, and short circuit protection functions
Use environment Temperature -40 °F to 158 °F (-40 ℃ to +70℃) Relative humidity ≤ 0 to 99 % RH (built-in filter can be used in high humidity or high dust environment)
Sample temperature -40 °F to 158 °F (-40 ℃ to +70 ℃), optional with extra charge high temperature sampling probe, can detect the flue gas concentration of 400 degrees or higher
Temperature measurement -104 °F to 248 °F (40 ℃ to +120℃)    Accuracy: 32.9 °F (0.5 ℃)
Humidity measurement 0 to 100 % RH, Accuracy 3 % RH
data storage Standard configuration of 100,000 data capacity, support history viewing, deletion or data export, free host computer communication software. The storage function is off by default, and can be set to on, and the storage time interval can be set arbitrarily.
Communication Interface USB (charging and communication),Optional with extra charge RS 485 or RS 232 communication interface
Interface language Chinese or English can be set
Explosion-proof type Intrinsic safe
Explosion-proof mark ExdⅡCT6
Protection level IP65, dust and splash proof
Standard accessories Manual, certificate of inspection and warranty card, USB charger (including data cable), aluminum alloy box, alligator clip, host computer communication software, 1PC humidity dust filter
Optional accessories Temperature and humidity measurement function, 1.2m retractable sampling probe (1-10m hose, standard length 1m), high temperature sampling probe, high temperature and high humidity pretreatment system, spare humidity dust filter.
Application occasions Petroleum, chemical, pharmaceutical, environmental protection, flue gas analysis, air treatment and other occasions where gas concentration needs to be detected.
Weight 0.66 lb (0.3 kg)
Dimensions 6.29 in x 2.75 in x 1.1 in (160 mm × 70 mm × 28 mm) (L×W×H)


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